229522145 has 4 divisors (see below), whose sum is σ = 275426580. Its totient is φ = 183617712.

The previous prime is 229522127. The next prime is 229522159. The reversal of 229522145 is 541225922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541225922 = 2 ⋅270612961.

It can be written as a sum of positive squares in 2 ways, for example, as 95726656 + 133795489 = 9784^2 + 11567^2 .

It is a cyclic number.

It is not a de Polignac number, because 229522145 - 2⁸ = 229521889 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22952210 + ... + 22952219.

It is an arithmetic number, because the mean of its divisors is an integer number (68856645).

Almost surely, 2^229522145 is an apocalyptic number.

It is an amenable number.

229522145 is a deficient number, since it is larger than the sum of its proper divisors (45904435).

229522145 is an equidigital number, since it uses as much as digits as its factorization.

229522145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45904434.

The product of its digits is 14400, while the sum is 32.

The square root of 229522145 is about 15149.9882838239. The cubic root of 229522145 is about 612.2679570839.

The spelling of 229522145 in words is "two hundred twenty-nine million, five hundred twenty-two thousand, one hundred forty-five".